Display everything we're missing.

Not just the first thing we see.

font-util/font-out.go

@@ -531,18 +531,24 @@ func main() {
 
 	if showCommand.Parsed() {
 		// Show Fonts
+		var exit bool
 		if len(fontList) == 0 {
 			showCommand.Usage()
 			fmt.Println("No Fonts selected.")
-			os.Exit(2)
+			exit = true
 		}
 
 		if len(showCommand.Args()) == 0 {
-			showCommand.Usage()
+			if !exit {
+				showCommand.Usage()
+			}
 			fmt.Println("No TDF Fonts files given.")
-			os.Exit(2)
+			exit = true
 		}
 
+		if exit {
+			os.Exit(2)
+		}
 		for _, fontfile := range showCommand.Args() {
 			fmt.Println("FILE:", fontfile)
 			DisplayFonts(fontfile, fontList, width)
@@ -551,15 +557,24 @@ func main() {
 
 	if extractCommand.Parsed() {
 		// Extract Fonts
+		var exit bool
+
 		if len(fontList) == 0 {
 			extractCommand.Usage()
 			fmt.Println("No Fonts selected.")
-			os.Exit(2)
+			exit = true
+
 		}
 
 		if len(extractCommand.Args()) == 0 {
-			extractCommand.Usage()
+			if !exit {
+				extractCommand.Usage()
+			}
 			fmt.Println("No TDF Fonts files given.")
+			exit = true
+		}
+
+		if exit {
 			os.Exit(2)
 		}